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Clear-Com HB-704 Encore 4-Channel Remote Headset Station
Clear-Com HB-704 Encore 4-Channel Remote Headset Station

Clear-Com HB-704 Encore 4-Channel Remote Headset Station

SoundPro Item: 31770
MPN: HB-704
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The HB-704 is a four-channel-selectable, full-duplex headset station, able to be mounted into a wall or other surface. This headset station is ideal for installation in theatrical, performance, broadcast, and industrial facilities - wherever a multi-channel, full-duplex headset communications panel is desired.

The HB-704 mounts in a standard US two-gang outlet box. The station covers excellent speech intelligibility even in high noise environments. Microprocessor-controlled logic plus a set of internal and external controls allow the features of the station to be tailored to the needs of the user. Electronic switching for the talk button, blue-color LED (on) or amber-color (o), permits momentary or latching operation. A Remote Mic Kill (RMK) signal on the intercom line will turn o the talk function if it is accidentally left on. A red-color LED tracks the incoming call signal, so it can be used for visual cueing.

An associated call button allows the user to place a call signal on the selected intercom line. The standard 4-pin XLR headset jack accommodates Clear-Com and compatible dynamic headsets. A sidetone level control adjusts the amount of the user’s voice heard in the headset. An automatic limiter circuit adjusts and limits the microphone output to the intercom line. A four-position switch allows the user to select from the attached intercom channels. Connections to the intercom lines are made via a screw-terminal block, using standard two-wire shielded mic cable.

The station may be used with the optional TW (two channels on a single mic cable) daughter board. With the TW board, the station becomes plug-in compatible with a Clear-Com TW system. The HB-704 is housed in a durable package with a steel front panel.

Clear-Com HB-704 Features

  • Momentary/Latching Talk switch with LED
  • Microprocessor controlled logic and switching
  • Visual call signaling
  • Headset connector with volume control and sidetone adjust
  • Optional 4-wire or TW daughter boards for flexibility
  • Mountable into a standard US two-gang outlet box
  • HB-704 Encore 4-channel remote headset station1
  • Headset Microphone Input
    • Input Type: Dynamic
    • Input Impedance: >= 1K
    • Mic Limiter Threshold: -2dBu ± 3dB
    • Mic Limiter Range: >= 15dB
  • Program Line Input
    • Input Impedance: >= 5K
  • Headset Output
    • Load Impedance: >= 8
    • Output Impedance: <= 25
    • Output Limiter Threshold: +5dBu ± 3dB
    • Maximum Output Level before Distortion: >= 17dBu
  • Partyline Output
    • Off Noise: < -74dBu
    • Output Impedance: >10K
  • Partyline Input
    • Crosstalk: < -60dB
    • Max level before Clipping: >= 12dBu
  • Frequency Response
    • Headset Mic – Partyline: 300 – 15kHz ± 3dB
    • Partyline – Headset Out: 300 – 15kHz ± 3dB
  • Max. Distortion
    • Headset Mic – Partyline: <= 0.5%
    • Partyline – Headset Out: <= 0.2%
  • Noise
    • Headset Mic – Partyline: < -70dBu
  • Max. Gain
    • Headset Mic – Partyline: 41dB ± 2dB
    • Partyline – Headset Out: >= 34dB
  • Power
    • Input Voltage Range: 20-30V DC
    • Input Current (Idle): <= 50mA
    • Input Current (Max): <=100mA
  • Internal Adjustments and Connections
    • Intercom Line: Seven terminal connector
    • Option Switches: Two DIP switches
    • Option Board Jumper: Two sets of options jumpers
  • Environmental32°F to 122°F (0°C to 50°C)
  • Dimensions (HxWxD)4.5" x 4.6" x 1.75"
  • Weight0.46 pounds (0.21 kg)

In The Box

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